Does my cat have 2 oxygen sensors?
My car has 123275 miles.
My car has an automatic transmission.
Hi there. The modern emissions system requires the use of at least (2) different O2 sensors. The upstream O2 sensor is designed to detect the amount of NoX coming out of your engine and adjusts your fuel/air ratio to correct and your downstream O2 sensor is located next to your catalytic converter to make sure the cat is doing its job.
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